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Disorder | Decreased SCFA-producing bacteria | Reference | Methodology |
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Generalized anxiety disorder (GAD) | Butyricicoccus spp. Eubacterium rectale Faecalibacterium spp. Lachnospira spp. Ruminococcus gnavus Fusobacterium spp. Sutterella spp. | Jiang et al. [56] | 16S rRNA gene pyrosequencing |
Major depressive disorder (MDD) | Bifidobacterium spp. Lactobacillus spp. | Aizawa et al. [57] | 16S rRNA sequencing |
Anti-NMDAR encephalitis | Bifidobacterium spp. Faecalibacterium spp. Prevotella_6 spp. Coprococcus spp. Faecalibacterium spp. Lachnospira spp. Roseburia spp. Ruminococcus spp. | Gong et al. [42] Chen et al. [41] | 16S rRNA gene pyrosequencing 16S rRNA gene pyrosequencing |
Acute hepatic encephalopathy | Bifidobacterium spp. Burkholderia spp. Enterococcus spp. Faecalibacterium spp. Roseburia spp. | Bajaj [58] Rai et al. [53] | Review: 16S rRNA gene pyrosequencing 16S rRNA gene pyrosequencing |
Acute ischemic stroke | Anaerostipes spp. Bacteroides spp. Blautia obeum Faecalibacterium spp. Roseburia spp. | Tan et al. [59] | 16S rRNA sequencing |
Parkinson’s disease (PD) | Faecalibacterium spp. Lachnospiraceae ND3007 Roseburia spp. | Nishiwaki et al. [60] | 16S rRNA sequencing, followed by meta-analysis |
Multiple sclerosis (MS) | Adlercreutzia spp. Anaerostipes spp. Bacteroides coprocola Bacteroides coprophilous Bacteroides stercoris Collinsella spp. Faecalibacterium spp. Lactobacillus spp. Parabacteroides spp. Provotella copri Sutterella spp. | Schepici et al. [55] | Review: 16S rRNA sequencing |
Alzheimer’s disease (AD) | Adlercreutzia spp. Bifidobacterium spp. Turicibacter spp. | Vogt et al. [61] | 16S rRNA sequencing |
Cognitive frailty and dementia | Eubacterium rectale | Ticinesi et al. [19] | Review: 16S rRNA sequencing |
Stress | Bacteroides spp. Collinsella spp. Faecalibacterium spp. Roseburia spp. | Karl et al. [62] | 16S rRNA sequencing |
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